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From Open Energy Information

Density Log
BestPractices If the density log is taken as part of a w
If the density log is taken as part of a wireline measurement, to minimize the influence of mud on the results, a pad is pressed into the borehole wall to focus the source and detector sensors into the formation. If instead the density measurement is taken during well drilling, a sleeve can be added around the sensors to exclude the mud coming between them. To further reduce the influence of mud, two or more sensors at different spacings can be used.
sensors at different spacings can be used.  +
DataAcquisition The data acquired is based on the average density of the rock between the sensor and the detector.  +
EstimatedCostHighUSD 80 centUSD (8.0e-4 kUSD, 8.0e-7 MUSD, 8.0e-10 TUSD)  +
EstimatedCostLowUSD 40 centUSD (4.0e-4 kUSD, 4.0e-7 MUSD, 4.0e-10 TUSD)  +
EstimatedCostMedianUSD 68 centUSD (6.8e-4 kUSD, 6.8e-7 MUSD, 6.8e-10 TUSD)  +
EstimatedTimeHigh 0.00381 years (33.36 hours, 1.39 days, 0.199 weeks, 0.0457 months)  +
EstimatedTimeLow 0.00189 years (16.56 hours, 0.69 days, 0.0986 weeks, 0.0227 months)  +
EstimatedTimeMedian 0.00189 years (16.56 hours, 0.69 days, 0.0986 weeks, 0.0227 months)  +
ExplorationCostPerMetric foot  +
ExplorationGroup Downhole Techniques +
ExplorationSubGroup Well Log Techniques +
ExplorationTimePerMetric job  +
FieldProcedures The geophysical/well logging service company conducts the down hole logging operation and produces both digital and hard copy logs. The Drilling contractor trips the drill pipe and bit and conditions the well bore for logging.  +
GeoUse Lithology identification, perosity +
HydroInfo Porosity of the formations loggesd can be calculated for the Density log andprovide an indication potential aquifers.  +
LithologyInfo provides data on the bulk density of the rock surrounding the well  +
NEPAanalysis Well logging is a standard operation associated with the drilling permit approval and is included in the down hole analysis of the drilling program.  +
Name Density Log  +
OpenEI/PageDescription About Density Log, a geothermal exploration technique, including areas of use.  +
OpenEI/PageKeyword geothermal  + , exploration  + , techniques  + , Density Log  + , areas  +
Pitfalls An unstable well bore (sluffing, wash outs
An unstable well bore (sluffing, wash outs, etc) can be of concern in any well logging operation. In extreme condition, the loss of the logging tool down hole could possibly result in the loss of the hole and would require premature abandonment or the necessity to side track to complete the well drilling operation. It is important to minimize the mud between the sensors, the source and the detector, because that can impact the accuracy of the signal. Also, changes in the borehole diameter can affect the measurement and provide inaccurate results because the distance between the source and the detector can change with depth in the well.
etector can change with depth in the well.  +
References [http://www.glossary.oilfield.slb.com/Display.cfm?Term=density%20measurement Schlumberger Oilfield Glossary- Density Measurements] [http://www.spec2000.net/07-densitylog.htm Crains Petrophysical Handbook]  +
StratInfo Stratigraphic correlation between well bores.  +
TypeOf Well Log Techniques +
Has query
"Has query" is a predefined property that represents meta information (in form of a subobject) about individual queries and is provided by Semantic MediaWiki.
Density Log + , Density Log + , Density Log + , Density Log + , Density Log + , Density Log + , Density Log + , Density Log + , Density Log + , Density Log +
Has processing error
"Has processing error" is a predefined property provided by Semantic MediaWiki and represents errors that appeared in connection with improper value annotations or input processing.
Density Log + , Density Log +
Categories Exploration Techniques , Geothermal , Well Log Techniques , Density Log
Modification date
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
20:12:01, 10 October 2013  +
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Density Log At Valles Caldera - Redondo Geothermal Area (Rowley, Et Al., 1987) + , Density Log At Valles Caldera - Redondo Geothermal Area (Wilt & Haar, 1986) + , Density Log at Alum Area (Moos & Ronne, 2010) + , Density Log at Fish Lake Valley Area (DOE GTP) + , Density Log at Fort Bliss Area (DOE GTP) + , Density Log at Gabbs Valley Area (DOE GTP) + , Density Log at Silver Peak Area (DOE GTP) + ExplorationTechnique
Exploration-Related Technique - Density + redirect page
 
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